zi1 gei2 zi1 bei2知己知彼

Jyutpingzi1 gei2 zi1 bei2
Yalejī géi jī béi
語句

Definition

To know oneself and the opponent well, ensuring victory or avoiding defeat in a conflict.

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How it's used

Originating from Sun Tzu's Art of War, this idiom is widely used in modern Cantonese to describe strategic preparation in competitive environments like business, sports, or negotiations. It emphasizes that success relies on a balanced assessment of both one's own strengths and the opponent's weaknesses. It is rarely used in casual small talk and carries a slightly formal or serious tone.

Examples

The most important thing in war is to know yourself and your enemy; don't charge in blindly.
You haven't even figured out your opponent's background yet, how can you claim to know yourself and the enemy?

Common phrases

If you know the enemy and know yourself, you need not fear the result of a hundred battles.

Grammar color guide

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